I'm a 'born in' and wasn't given a choice about whether I believed or not. I was 'inculcated' to believe and probably did. Until I hit an age when all of the previously shoved to one side anomalies and questions became too much to ignore. Then I became a 'born in waiting patiently until old enough to escape' type.

Now I'm a 'worldly' person with 30 years experience behind me

"Thanks to God .... for making me an Atheist!"
Ricky Gervais
Golden Globe Awards - 2011